Pueyrredón, Juan Martín de

Pueyrredón, Juan Martín de

(hwän märtēn` dā pwāĭrādōn`), 1776–1850, Argentine general, supreme director of the United Provinces of La Plata (1816–19). In 1806, when British troops under William Carr BeresfordBeresford, William Carr Beresford, Viscount,
1768–1854, British general. He served with distinction in Egypt (1801–3) and participated (1806) in the capture of Cape Colony (later Cape Province, South Africa) from the Dutch.
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 invaded the Río de la Plata, he organized a volunteer force, which, after a defeat outside Buenos Aires, united with the army of LiniersLiniers, Jacques de,
Span. Santiago de Liniers y de Bremond , 1753–1810, French officer in Spanish service, viceroy of Río de la Plata. After a military and naval career in Europe, he was transferred to the Río de la Plata (1788) as a Spanish naval
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 to recapture the city (Aug. 12). Taking an important part in the revolutionary government, he was governor of Córdoba (1810) and of Charcas (1810–11), commander of the patriot Army of the North (1811–12), and a member of the triumvirate at Buenos Aires (1812). As supreme director, he assisted San MartínSan Martín, José de
, 1778–1850, South American revolutionist, b. Yapeyú, in present-day Argentina. After service with the Spanish army in Europe, he returned (1812) to join the revolution against Spain in his native country.
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 in the Chilean campaign of 1817–18. In 1819 congress promulgated a unitarian constitution, which was rejected by the people. The demand for federalism brought Pueyrredón's resignation. His success in preventing anarchy was transient; the civil war of 1820 followed.
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